Christian0734
Senior Member
Last Activity: 06-13-2024, 04:55 AM
Joined: 11-11-2020
Location: Montpellier
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The PC is working, so I'll take this opportunity to remind everyone of a basic rule that I had forgotten! If the PC boots into the BIOS, make sure to load the default settings before proceeding further. I had forgotten to do this, and my PC was showing the symptoms I described in my previous post. Hopefully, this can help someone. Furthermore, for serial numbers and keys, I followed the procedure of a contributor in this thread using the HxD software, which is super easy. Thanks to all the contributors of this irreplaceable forum
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With the BIOS provided by [USER="184406"]danito[/USER] , the 'LENOVO' logo appears and I can boot from my Ventoy SSD, as you can see in the photo. But as soon as I select an application and press Enter, the computer shuts down instantly. The same thing happens if I boot into Ubuntu: I can select the version, but as soon as the desktop is about to appear, the computer shuts down. It's not just the screen; the entire computer shuts down, with no power consumption. I've tried flashing it several times, but the result is the same. Does anyone have another BIOS to suggest?danito...
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Thank you very much, there is progress. The computer starts, and the screen displays this (see attached photo). What do you think?...
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Hello,
LENOVO Ideapad 330S-15ARR
MO: YDN0B882001W
S/N: YD05B8QJ
Motherboard: MV-6 94V-0
Symptom: The PC starts, the fan runs, the lights are on. No display on the screen or HDMI port. Consumption: 1.5 A.
Do you have a BIOS to test?
Here is the backup of the BIOS.
Thank you.
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Unfortunately, regarding the BIOS, I couldn't get more than that and now it's too late because I've already erased the chip to write on it...Leave a comment:
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Hello, the BIOS of an HP 250 G6 Motherboard: DKL50/CSL52 LA-E821P was corrupted following an update. When performing a clear CMOS, the message 'CMOS checksum invalid...' is displayed at startup, and then, when the computer restarts after pressing "F1", a black screen appears with a consumption of about 0.220 A.
I followed the procedures: I backed up the computer's BIOS, then downloaded the update file for the latest BIOS available on the HP website and extracted the BIOS files. There are 5 different ones: 084D4.bin; 0832D.bin; 0832E.bin; 08328.bin; 08445.bin.
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Packard Bell N15W4: ALT and ALTGR keys not working
After installing Windows 10 from an ISO, a task I regularly perform 5 days a week, I encountered an issue with a Packard Bell N15W4: the ALT and ALT GR keys (on a French AZERTY keyboard) are no longer working. Of course, basic operations such as reinstalling the keyboard through the device manager have been unsuccessful. Currently, I no longer have physical access to the computer, and during remote access, my keyboard correctly sends the ALT and ALT GR signals to the concerned computer. Do you have any suggestions? Is there a specific firmware for the keyboard? Despite my searches on the internet,... -
Wow! Incredible, it works, I only replaced the one I took a photo of and I got the Backlight working on battery! Sincerely, thank you [B][URL="https://www.badcaps.net/member/149220-mcplslg123"][B][U]mcplslg123[/U][/B][/URL][/B] et [B][URL="https://www.badcaps.net/member/295753-mon2"][B][U]lundi2[/U][/B][/URL][/B]
Wow! Incredible, it works, I only replaced the one I took a photo of and I got the Backlight working on battery! Sincerely, thank you [B][URL="https://www.badcaps.net/member/149220-mcplslg123"][B][U]mcplslg123[/U][/B][/URL][/B] et [B][UR...Leave a comment:
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It's not so much about the cost of the component, but the shipping fees and availability. I have a few broken screens, so I might just find what I'm looking for...
Do you think these two coils are equivalent?...Leave a comment:
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Yes, indeed, I have browsed through the forum and found what you were talking about. However, I can't seem to identify which coil is being referred to. I have three where it is marked "100"...Leave a comment:
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Hello, you mention that the problem has been solved. How did you resolve it? Was it by changing the coils on the screen's board? I am interested because I am facing the exact same issue with an ASUS X553M. Sharing your solution could greatly help the community. Thank you for your response...Leave a comment:
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Thank you for the message. I do not plan to change the integrated circuit. It was only a matter of coils in the message from "mcplslg123". However, do you think that if the backlight does not work on battery but does work on mains power, could it be due to U5?...Leave a comment:
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The IC on the first photo between the two coils: U2 CM512
The other one completely to the left next to the largest coil: U5 CM509A...Leave a comment:
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Is there an explanation for this? I am surprised. The photo is misleading, the two coils circled in red in the photo are exactly identical and have the same resistance to current flow 0.2 Ω....Leave a comment:
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I disassembled the screen, I found three coils with the number 100 (see photo), none of them are cut...
For the fan, however, it's fixed, it was the NCT7717U thermal sensor that must have acted as a fuse....Leave a comment:
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I no longer need the component, I managed to find one on a donor motherboard. But it could be useful for another time.Leave a comment:
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Crossover for NCT7717U Thermal sensor
Hello, I am looking for an equivalent to the NCT7717U, it's a thermal sensor on an ASUS X553MA motherboard, can you help me? -
Ok, thank you for the information, I will dismantle the screen....Leave a comment:
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Thank you for this response. Point to consider:
the screen backlight works on mains power. It also works when an external monitor is connected to the HDMI port in battery mode. The battery is new, and the phenomenon occurs with both the old and new batteries. The computer and display work normally on battery, it's only the backlight in battery mode that does not work. In this case, can we suspect a problem with the inverter or a component on the screen's board?...Leave a comment:
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Asus X453MA Rev 2.0 Backlight and fan
Hello,
I brought an Asus X453MA into the workshop, its owner tells me that it doesn't work on battery despite having replaced it with a new one and that it's making noise. I diagnose and find, firstly, that the fan is constantly running at full speed. Secondly, that the computer works on battery but there's no backlight when the charger is not connected. I look at the screen connector because I see that the adhesive is not holding. I observe that there probably was a short circuit. I isolated everything with hot glue and reassembled it, I don't think it needs to be replaced. The BIOS is...
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